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分析了公用交换电话网络工作原理,分析了在因特网和基于IP的数据网上传送语音业务技术的协议标准及其在市场应用方面的优势,并给出了一个VoIP组网模型。
The working principle of public switched telephone network is analyzed. The protocol standard for transmitting voice service technology over Internet and IP-based data network and its advantages in market application are analyzed. A VoIP network model is also given.